/*M///////////////////////////////////////////////////////////////////////////////////////
//
//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
//
//
//                           License Agreement
//                For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
//   * Redistribution's of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//
//   * Redistribution's in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//
//   * The name of the copyright holders may not be used to endorse or promote products
//     derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/

#ifndef _GRFMT_EXR_H_
#define _GRFMT_EXR_H_

#ifdef HAVE_ILMIMF

#include <ImfChromaticities.h>
#include <ImfInputFile.h>
#include <ImfChannelList.h>
#include <ImathBox.h>
#include "grfmt_base.hpp"

namespace cv {

using namespace Imf;
using namespace Imath;

/* libpng version only */

class ExrDecoder : public BaseImageDecoder {
public:

	ExrDecoder();
	~ExrDecoder();

	bool  readData( Mat& img );
	bool  readHeader();
	void  close();

	ImageDecoder newDecoder() const;

protected:
	void  UpSample( uchar* data, int xstep, int ystep, int xsample, int ysample );
	void  UpSampleX( float* data, int xstep, int xsample );
	void  UpSampleY( uchar* data, int xstep, int ystep, int ysample );
	void  ChromaToBGR( float* data, int numlines, int step );
	void  RGBToGray( float* in, float* out );

	InputFile*      m_file;
	PixelType       m_type;
	Box2i           m_datawindow;
	bool            m_ischroma;
	const Channel*  m_red;
	const Channel*  m_green;
	const Channel*  m_blue;
	Chromaticities  m_chroma;
};


class ExrEncoder : public BaseImageEncoder {
public:
	ExrEncoder();
	~ExrEncoder();

	bool  isFormatSupported( int depth ) const;
	bool  write( const Mat& img, const Vector<int>& params );
	ImageEncoder newEncoder() const;
};

}

#endif

#endif/*_GRFMT_EXR_H_*/
